How to resolve when the PC picture is flickering, shaking or has vertical stripes?

PC picture is flickering, shaking or has vertical stripes when PC is connected to the TV.

Please try the following:

Adjust TV screen

(1) When PC picture is flickering or shaking.
Please adjust Phase in screen mode of TV manually. PressOPTIONS on the Remote and select Display → Screen → Phase → Move the on-screen cursor to the right or left

(2) When PC picture has vertical stripes.
Please adjust Pitch in screen mode of TV manually. PressOPTIONS on the Remote and select Display → Screen → Pitch → Move the on-screen cursor to the right or left

Change PC output format to other resolutions supported by this TV.
Please check the operation/settings of your PC.
Please refer to i-Manual on this TV to check supported resolution about PC input.